EP 0952165 A1 19991027 - Production of polyethylene having improved mechanical properties

Title (en)

Production of polyethylene having improved mechanical properties

Title (de)

Herstellung von Polyethylene mit verbesserten mechanischen Eigenschaften

Title (fr)

Préparation de polyéthylène ayant des propriétés mécaniques améliorées

Publication

EP 0952165 A1 19991027 (EN)

Application

EP 98107493 A 19980424

Priority

EP 98107493 A 19980424
EP 9902721 W 19990422

Abstract (en)

A process for producing a polyethylene resin having improved mechanical properties, the process comprising polymerising ethylene in the presence of a chromium-based catalyst to make polyethylene homopolymer in a first polymerisation reactor and in a second polymerisation reactor downstream of the first polymerisation reactor copolymerising ethylene in the presence of the chromium-based catalyst and a co-catalyst from ethylene monomer and comonomer generated in-situ in the second polymerisation reactor to make polyethylene copolymer.

IPC 1-7

C08F 210/02; C08F 2/00; C08F 4/69

CPC (source: EP US)

C08F 110/02 (2013.01 - EP); C08F 210/02 (2013.01 - US); C08F 297/08 (2013.01 - EP); C08L 23/06 (2013.01 - EP); C08F 2410/06 (2021.01 - EP); Y02P 20/52 (2015.11 - EP)

C-Set (source: EP US)

C08F 110/02 + C08F 2500/12 + C08F 2500/07
C08F 110/02 + C08F 2500/12
C08F 110/02 + C08F 2/001
C08F 110/02 + C08F 4/24
C08F 110/02 + C08F 4/69
C08L 23/06 + C08L 23/0815

C08F 210/02 + C08F 2/001

Citation (search report)

[XA] EP 0832905 A1 19980401 - FINA RESEARCH [BE]
[XA] EP 0739909 A1 19961030 - SOLVAY [BE]
[AD] EP 0307907 A2 19890322 - PHILLIPS PETROLEUM CO [US]

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0952165 A1 19991027; AT E314404 T1 20060115; AU 4032399 A 19991116; DE 69929171 D1 20060202; DE 69929171 T2 20060914; DE 69936343 D1 20070802; DE 69936343 T2 20080221; EP 1046655 A1 20001025; EP 1046655 B1 20051228; EP 1046656 A1 20001025; EP 1082367 A1 20010314; EP 1082367 B1 20070620; JP 2000063422 A 20000229; US 6265500 B1 20010724; WO 9955749 A1 19991104

DOCDB simple family (application)

EP 98107493 A 19980424; AT 99121117 T 19991022; AU 4032399 A 19990422; DE 69929171 T 19991022; DE 69936343 T 19990422; EP 9902721 W 19990422; EP 99121117 A 19991022; EP 99121143 A 19991022; EP 99923443 A 19990422; JP 11650299 A 19990423; US 29691999 A 19990422